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    Safety Evaluation of Branch Pipe in Hydropower Station Using Elastic Modulus Reduction Method

    Source: Journal of Pressure Vessel Technology:;2012:;volume( 134 ):;issue: 004::page 41202
    Author:
    LuFeng Yang
    ,
    Wei Zhang
    ,
    Bo Yu
    ,
    LiWen Liu
    DOI: 10.1115/1.4005872
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The high pressure branch pipe in hydropower station (BPHS) is usually composed by different materials in different parts and has complicated geometric configurations. The accurate and efficient methods for safety evaluation of the BPHS are still desirable. By introducing the element bearing ratio (EBR), generalized yield criterion as well as the reference volume concept, the elastic modulus reduction method (EMRM) is improved and applied to determine both the upper and lower bounds on limit loads of the BPHS. The global safety factor (GSF) is defined as the ratio of limit load to design load. The safety performance of the BPHS is assessed by comparing the GSF resulted from the EMRM with its allowable value specified in code. The efficiency and precision of the proposed method for safety evaluation of the BPHS are demonstrated through numerical examples in this paper. The results show that the proposed method is more suitable for safety evaluation and design optimization of the BPHS, compared with the elastic stress analysis method (ESAM) based on stress categorization which might underestimate the safety performance of the BPHS.
    keyword(s): Safety , Stress , Pipes , Elastic moduli , Shells , Bifurcation , Hydroelectric power stations AND Design ,
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      Safety Evaluation of Branch Pipe in Hydropower Station Using Elastic Modulus Reduction Method

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    http://yetl.yabesh.ir/yetl1/handle/yetl/150086
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    contributor authorLuFeng Yang
    contributor authorWei Zhang
    contributor authorBo Yu
    contributor authorLiWen Liu
    date accessioned2017-05-09T00:53:58Z
    date available2017-05-09T00:53:58Z
    date copyrightAugust, 2012
    date issued2012
    identifier issn0094-9930
    identifier otherJPVTAS-926073#041202_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/150086
    description abstractThe high pressure branch pipe in hydropower station (BPHS) is usually composed by different materials in different parts and has complicated geometric configurations. The accurate and efficient methods for safety evaluation of the BPHS are still desirable. By introducing the element bearing ratio (EBR), generalized yield criterion as well as the reference volume concept, the elastic modulus reduction method (EMRM) is improved and applied to determine both the upper and lower bounds on limit loads of the BPHS. The global safety factor (GSF) is defined as the ratio of limit load to design load. The safety performance of the BPHS is assessed by comparing the GSF resulted from the EMRM with its allowable value specified in code. The efficiency and precision of the proposed method for safety evaluation of the BPHS are demonstrated through numerical examples in this paper. The results show that the proposed method is more suitable for safety evaluation and design optimization of the BPHS, compared with the elastic stress analysis method (ESAM) based on stress categorization which might underestimate the safety performance of the BPHS.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleSafety Evaluation of Branch Pipe in Hydropower Station Using Elastic Modulus Reduction Method
    typeJournal Paper
    journal volume134
    journal issue4
    journal titleJournal of Pressure Vessel Technology
    identifier doi10.1115/1.4005872
    journal fristpage41202
    identifier eissn1528-8978
    keywordsSafety
    keywordsStress
    keywordsPipes
    keywordsElastic moduli
    keywordsShells
    keywordsBifurcation
    keywordsHydroelectric power stations AND Design
    treeJournal of Pressure Vessel Technology:;2012:;volume( 134 ):;issue: 004
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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